Andreas coached the Orangemen basketball team from 1924 to 1950, except for two years in World War II when the team was suspended due to travel restrictions. He guided the Orangemen basketball program to a 355–134 (.726) overall record in 24 years, including the Helms Athletic Foundation national championship in 1925–26. They finished 19–1 that season and were led by standout Vic Hanson. In football, Andreas compiled a 15–10–3 overall record between 1927 and 1929.